CN109841392A

CN109841392A - Coil device

Info

Publication number: CN109841392A
Application number: CN201811214030.7A
Authority: CN
Inventors: 比嘉晋士; 熊谷胜; 岩仓正明
Original assignee: TDK Corp
Current assignee: TDK Corp
Priority date: 2017-11-28
Filing date: 2018-10-18
Publication date: 2019-06-04
Anticipated expiration: 2038-10-18
Also published as: CN109841392B; JP2019102496A; JP7143583B2

Abstract

The present invention provides a kind of coil device, and heat dissipation characteristics are excellent, and can accurately install relative to other devices.Coil device includes and is wound with the skeleton of coiling, accommodates above-mentioned skeleton and install to external shell, be filled in above-mentioned skeleton and the resin in the gap of above-mentioned shell, the portion of terminal for being fixed on above-mentioned shell and connecting above-mentioned coiling.

Description

Coil device

Technical field

The present invention relates to may be adapted to the coil device as the transformer such as leakage transformer.

Background technique

Coil device is various on the way for various electric products.For example, coil device is in EV (Electric Vehicle: electric transportation equipment), PHV (Plug-in Hybrid Vehicle: plug-in hybrid vapour Vehicle) or the vehicle-mounted charger or LLC circuit etc. of commuting (vehicle) in the change that uses, and be typically used as leakage transformer etc. Depressor.

As coil device, such as it has been known that there is coil devices shown in patent document 1 shown in following.1 institute of patent document In the coil device shown, the adjustment of Magnetic leakage characteristics is easy, and can be corresponded to and be highed frequency on one side realize high current while.

Existing technical literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2015-65413 bulletin

Summary of the invention

Problems to be solved by the invention

In recent years, it proposes a kind of technology, such coil device shown in patent document 1 is not fixed directly and used, and Be contained in by resin filling shell in carry out using.By accommodating skeleton etc. into the shell filled by resin, coil can be made The radiating efficiency of device rises, and inhibit loss etc..But when accommodating skeleton in shell, with showing for direct fixed skeleton The problem of some coil devices are different, generate the position precision deterioration for being formed in the terminal of skeleton, and assembling becomes difficult.Separately Outside, in the existing coil device of skeleton setting terminal, there are also problems from the viewpoint of miniaturization.

The present invention is researched and developed in view of this actual state, it is intended that provide a kind of coil device, heat dissipation characteristics It is excellent, and can accurately be installed relative to other devices.

Solution for solving the problem

In order to reach the purpose, the present invention provides a kind of coil device, includes

Skeleton is wound with coiling；

Shell accommodates the skeleton and installs to outside；

Resin is filled in the gap of the skeleton Yu the shell；And

Portion of terminal is fixed on the shell and connects by the coiling.

In coil device of the invention, skeleton is accommodated in the shell filled with resin, therefore, thermal diffusivity is excellent, and holds Sub-portion is fixed on installation to external shell, when being installed accordingly, with respect to other devices, the position deviation of portion of terminal compared with It is few.Therefore, the heat dissipation characteristics of this coil device are excellent, and can accurately install relative to other devices.

In addition, for example, the shell and the portion of terminal can also integrally insert part formings.

In this coil device, the position precision of portion of terminal and shell is high, and manufactures and be easy.In addition, with bolt etc. is utilized It compares in the existing coil device of skeleton setting portion of terminal, is also advantageous from the viewpoint of miniaturization and low level.

In addition, for example, the coiling also can have the first coiling, with discontinuous second coiling of first coiling,

First coiling can also be formed the upper coil configured separated from each other along the wireline reel of the skeleton and Lower coil,

Second coiling can also form the middle part line of α winding between the upper coil and the lower coil Circle.

In addition, first coiling can also be to form the top configured separated from each other along the wireline reel of the skeleton The mode α of coil and lower coil is wound in the skeleton,

Second coiling can also form middle coil between the upper coil and the lower coil.

This coil device is the middle coil that the second coiling is clamped using the upper coil and lower coil of the first coiling Structure.Therefore, the coupling between these coils, the stabilisation of Magnetic leakage characteristics easy to accomplish be can be improved.In addition, can be realized i.e. Make also obtain the coil device of stable Magnetic leakage characteristics in high band.In addition, carry out α winding to skeleton and formed, and shape At middle coil, even if α winding increases circle number, therefore the number of plies that can also reduce winding axis direction facilitates coil device Low level, miniaturization.In addition, the coiling from winding central part, which is drawn, to disappear, and therefore, coiling will not by being set as α winding Overlapping, therefore, facilitates the low level of coil device.

It is α winding by middle coil, facilitates the stabilisation of Magnetic leakage characteristics.In addition, by by the first coiling or second Coiling is set as α winding, is also easy to make the circle number of coil to be set as phase in each interlayer of upper coil, middle coil and lower coil Together, in addition, being also easy to make to enclose number variation.

In addition, upper coil and lower coil are continuously formed using the first coiling.By being set as this structure, Neng Goufang Only electric current is biased to the circulation of either upper coil and lower coil.It prevents electric current to be biased to circulation, therefore, either one can be prevented Coil abnormal heating.In addition, structure can be shortened compared with the case where constituting upper coil and lower coil using different coilings At upper coil and lower coil the first coiling around wire length, copper loss mistake can be reduced.It, can if copper loss mistake can be reduced It enough improves efficiency, and also reduces fever.

In addition, for example, the portion of terminal also can have: first end sub-portion connects first coiling；Second terminal Portion is set to side opposite with the side that the first end sub-portion is arranged in the shell and connection second coiling.

It can be mentioned by the way that first end sub-portion and second end sub-portion, this coil device is arranged in the side of shell and the other side Insulating properties between high first coiling and the second coiling.In addition, any portion of terminal is both secured to shell, therefore, end when installation The position precision of son is good.

In addition, for example, the portion of terminal also can have: terminal fixing part, in the portion of terminal with the shell It contacts and fixed；Coiling interconnecting piece extends from the terminal fixing part to side and is connected with the coiling；External connection Portion extends from the terminal fixing part to the other side.

In this coil device, the position precision of external connecting when installation is good, therefore, can effectively and easily into Wiring after row installation.In addition, clamping terminal fixed part, and coiling interconnecting piece and external connecting be set to it is mutually different Therefore side is easy to carry out the operation to external connecting wiring after mounting, in addition, can also prevent to external connecting Heat when wiring operation is transferred to the problem of coiling interconnecting piece.

In addition, for example, the end of the coiling can also be blown relative to the portion of terminal.

The manufacture of this coil device is easy, and reliability relevant with the connection of portion of terminal to coiling is higher.

In addition, for example, the portion of terminal also can have the coiling interconnecting piece of coiling connection,

The coiling interconnecting piece can also be configured at the periphery viewed from above than the shell in the outer part.

This coil device can increase the distance between terminal and improve insulating properties, in addition, not upwards by coiling interconnecting piece And stretch outward, thereby, it is possible in wiring operation after mounting etc., prevent coiling interconnecting piece from becoming obstacle.Separately Outside, by stretching at the both ends of coiling in parallel towards outside, it also can be realized the stabilisation of Magnetic leakage characteristics.

Detailed description of the invention

Fig. 1 is the perspective view of the transformer of the coil device as an embodiment of the invention；

Fig. 2 is the perspective view of the transformer shown in FIG. 1 from other directions；

Fig. 3 is the top view of transformer shown in FIG. 1；

Fig. 4 is the exploded perspective view of transformer shown in FIG. 1；

Fig. 5 is the main portion sectional view of transformer shown in FIG. 1；

Fig. 6 is the perspective view for the shell that transformer shown in FIG. 1 is included；

Fig. 7 is the perspective view for the portion of terminal that transformer shown in FIG. 1 is included；

Fig. 8 is the perspective view of the skeleton that transformer shown in FIG. 1 is included and insulating boot；

Fig. 9 is that the decomposition of the upper coil, lower coil and the middle coil that indicate that transformer shown in FIG. 1 is included is vertical Body figure；

Figure 10 is the side view of upper coil, lower coil and middle coil that transformer shown in FIG. 1 is included；

Figure 11 is the circuit diagram for indicating the equivalent circuit of transformer shown in FIG. 1.

Specific embodiment

Hereinafter, embodiment based on the figure illustrates the present invention.

The transformer 10 of coil device shown in FIG. 1 as present embodiment is used for such as EV (Electric Vehicle: electric transportation equipment), PHV (Plug-in Hybrid Vehicle: plug-in hybrid-power automobile) or commuting The vehicle-mounted charger of (vehicle) etc. is used for constituting such as a part of LLC circuit.

As shown in Fig. 4 as exploded perspective view, which includes skeleton 20, magnetic magnetic core 40a and 40b, side cover 50, pedestal 86, they are contained in internal shell 90 (referring to Fig. 3), bottom plate 92, portion of terminal 70.In addition, saving sketch map in Fig. 4 Show, but transformer 10 has the coil 300 (Fig. 9) formed using the first coiling 38 and the second coiling 37 that are wound in skeleton 20. In addition, X-axis, Y-axis and Z axis are mutually perpendicular in attached drawing, Z axis is corresponding with height (thickness) of transformer 10.In present embodiment, The lower section of the Z-direction of transformer 10 becomes the setting face of transformer.In addition, the short-axis direction of the skeleton 20 of Y-axis and ellipse Unanimously.In addition, X-axis is consistent with the long axis direction of skeleton 20.

In present embodiment, as shown in Figures 2 and 6, bottom plate 92 is being installed on shell 90 by way of riveting or be bonded etc. Bottom peristome.As shown in fig. 6, the upper opening portion of shell 90 is opened.Bottom plate 92 is excellent preferably by thermal diffusivity The metal of aluminium, copper, iron etc. is constituted, but the resin that also can use PPS, PET, PBT etc. is constituted.The Z of aftermentioned magnetism magnetic core 40b The lower end surface of axis direction is directly or via resin and bottom plate 92 in contact with or close to therefore, bottom plate 92 is excellent preferably by thermal diffusivity Material constitute.The cooling device of cooling tube, cooling fin etc. can also be assembled via bottom plate 92 or directly in the lower section of shell 90. In addition, shell 90 and bottom plate 92 can also be illustrated in figure 4 sole body, but it also can be shaped as one.

As shown in Figures 2 and 6, shell 90 has the outer shape for four side tubulars being substantially rectangular from Z-direction, Shell 90 is installed on the component of the substrate of fixed transformer 10 or the outside of frame etc..Shell 90 also can have for by shell 90 are directly fixed on external mounting portion.Shell 90 is directly fixed on external mounting portion and is also possible to such as bolt hole or edge The structure of the such fixation member for bolt etc. to be arranged of the notch that extends of Z-direction, be also possible to for fixing shell Structure as 90 stationary plane or bonding plane.Shell 90 also can use the composition such as synthetic resin, also can use metal structure At.In addition it is also possible to which bottom plate 92 and shell 90 is by ester moulding etc. and integrally formed using resin material.Such as Fig. 1 and Fig. 2 It is shown, the portion of terminal 70 for the coiling connection being made of the first coiling 38 and the second coiling 37 is fixed on shell 90 (referring to figure 7).Portion of terminal 70 is carried out aftermentioned.

As shown in Fig. 3 etc., in the inside of shell 90, more specifically, in the skeleton 20 and magnetism being contained in shell 90 The gap filling of the inner surface of magnetic core 40a, 40b and shell 90 has the resin 88 of heat transmission.As the resin 88 of heat transmission, do not have It is particularly limited to, such as the resin that preferably pyroconductivity is 0.5~5, the thermal diffusivity of preferably 1~3W/mK is excellent.As scattered Hot excellent resin 88, such as with silicone-based resin, polyurethane series resin, epoxy system resin etc., but wherein, preferably silicon Ketone resin, polyurethane resin.In addition, in order to improve thermal diffusivity, the filler that resin 88 can also be high containing heat conductivity.

Additionally, it is preferred that the Shore A hardness of the heat transmission resin 88 of present embodiment is 100 hereinafter, preferably 60 or less.It is Due to, even if magnetism magnetic core 40a, 40b or skeleton 20 are deformed due to heat, also the deformation is absorbed, do not make magnetic magnetic core 40a, 40b generates excessive stress.As this resin, example injecting glue (potting) resin.

As shown in the i.e. Fig. 5 of cross-sectional view for the transformer 10 for removing shell 90 and resin 88, in the skeleton for being contained in shell 90 20 are wound with the coil 300 formed by the first coiling 38 and the second coiling 37.Fig. 9 and Figure 10 is show transformer 10 first The figure of coiling 38 and the second coiling 37.Figure 10 is matching for the first coiling 38 from side in transformer 10 and the second coiling 37 Set the figure of state.Fig. 9 is in order to indicate with being readily understood by the shape of the first coiling 38 and the second coiling 37, and by the first coiling 38 The perspective view shown relative to the configuration status in transformer 10 to X-direction biasing with the second coiling 37.

As shown in FIG. 9 and 10, transformer 10 has the first coiling 38 and discontinuous second coiling 37 of the first coiling 38 Two coilings.First coiling 38 and the second coiling 37 are wound around the skeleton main body 21 of skeleton 20 and form coil 300.Line Circle 300 includes upper coil 301, lower coil 302, the middle part between these upper coils 301 and lower coil 302 Coil 303.

As shown in figure 9, the first coiling 38 be formed with configured separated from each other along the wireline reel parallel with Z-direction it is upper Portion's coil 301 and lower coil 302.Second coiling 37 is formed with middle coil between upper coil 301 and lower coil 302 303, middle coil 303 is clamped along the wireline reel (Z-direction) of coil 300 by upper coil 301 and lower coil 302.

In present embodiment, the upper coil 301 and lower coil 302 of the first coiling 38 constitute primary coil, second around The middle coil 303 of line 37 constitutes secondary coil.That is, as shown in figure 11, the upper coil 301 that formed by the first coiling 38 and under Portion's coil 302 becomes primary side winding, becomes primary side winding by the middle coil 303 that the second coiling 37 is formed, as a result, two Transformer is formed between person.

In present embodiment, compared with secondary coil, high voltage is acted on to primary coil, lower electricity is acted on to secondary coil Pressure.Here, La shown in Figure 11 is leakage inductance.

First coiling 38 and the second coiling 37 can also be made of single line respectively, or can also be made of respectively twisted wire, or Can also be using a side as single line, another party is twisted wire.First coiling 38 and the second coiling 37 can also be made up of identical material, It can also be different.The outer diameter of first coiling 38 and the second coiling 37 is not particularly limited, but the range of preferably 1.0~4.0mm. For example, the outer diameter ratio for forming the second coiling 37 of secondary coil is formed in the case where the electric current to circulate to secondary coil becomes larger The outer diameter of first coiling 38 of primary coil is big, such as preferably 3.0~4.0mm.In addition, the first coiling 38 and the second coiling 37 The covering thread preferably coated by insulating coating.

Fig. 1 and first lead portion 38a, 38b shown in Fig. 2 are the both ends of Fig. 9 and the first coiling 38 shown in Fig. 10.Such as Shown in Fig. 9, first lead portion 38a is drawn from lower coil 302, and first lead portion 38b is drawn from upper coil 301.Such as Fig. 1 institute Show, after first lead portion 38a, 38b is retracted in the coiling guide table 23 of skeleton 20, with the first end sub-portion for being fixed on shell 90 76,78 connection.

In addition, Fig. 1 and the second leading part 37a, 37b shown in Fig. 2 are the both ends of Fig. 9 and the second coiling 37 shown in Fig. 10 Portion.As shown in figure 9, second leading part 37a, 37b is drawn from middle coil 303.As shown in Figure 1, second leading part 37a, 37b exists Magnetic core 40 is clamped with the coiling guide table 23 for retracting first lead portion 38a, 38b and is configured in the coiling guide table 22 of opposite side After retracting, it is connect with the second end sub-portion 72,74 for being fixed on shell 90.

As shown in figure 9, in present embodiment, total circle of the first coiling 38 in upper coil 301 and lower coil 302 Number n1 is equal with total circle number n2 of the second coiling 37 of middle coil 303 is constituted.But n1 and n2 can also be different, such as Also it can be set to n1 > n2, or also can be set to n1 < n2.In present embodiment, even if in the ratio (n1/n2) of these circle numbers In larger situation or lesser situation, the coefficient of coup can also be made larger, facilitate the stabilisation of Magnetic leakage characteristics.

It is preferred that total circle number n1 of upper coil 301 and lower coil 302 that the first coiling 38 is formed substantially uniformly divides It, can also be slightly different at upper coil 301 and lower coil 302.That is, the circle number of the first coiling 38 of upper coil 301 is excellent It is selected as (0.3~0.7) × n1, the circle number of the first coiling 38 of lower coil 302 is preferably (0.7~0.3) × n1.Be due to, Increase the coefficient of coup of primary coil and secondary coil.

As shown in Figure 10, the first coiling 38 has between upper coil 301 and lower coil 302 along wireline reel (Z axis) Interconnecting piece 380 between the first coil that direction extends.In present embodiment, upper coil 301 and lower coil 302 using first around Line 38 is continuously formed, and therefore, is formed between upper coil 301 and lower coil 302 in the first coiling 38 along wireline reel Interconnecting piece 380 between the first coil that direction extends.

As shown in Figure 10, the internal side diameter that interconnecting piece 380 passes through middle coil 303 between first coil.Carry out in detail it is aftermentioned, but In present embodiment, the first coiling 38 is wound in skeleton 20 first, forms upper coil 301 and lower coil 302, then will Second coiling 37 is wound in skeleton 20, forms middle coil 303.

In this way, second coiling 37 is wound in skeleton 20, as a result, First Line after the first coiling 38 is wound in skeleton 20 Interconnecting piece 380 does not pass through internal side diameter by the outside diameter of middle coil 303 between circle.As shown in figure 5, in order to will be between first coil Interconnecting piece 380 insulate from middle coil 303, and the first insulating boot 81 is assemblied in skeleton 20.For the first insulating boot 81, later into Row explains in detail.

As shown in Figure 10, the second coiling 37 has between the first layer and the second layer of middle coil 303 along wireline reel (Z Axis) direction extend the second coil between interconnecting piece 370.In present embodiment, the first layer and the second layer of middle coil 303 are utilized Second coiling 37 is continuously formed, therefore, between the first layer and the second layer for being formed in middle coil 303 in the second coiling 37 The interconnecting piece 370 between the second coil that winding axis direction extends.

As shown in figure 9, the second leading part 37a is drawn from the first layer (upper layer) of middle coil 303 in the second coiling 37, The second leading part 37b is drawn from the second layer (lower layer) of middle coil 303.

More specifically, as shown in figure 9, second leading part 37a, the 37b for being formed in the both ends of the second coiling 37 includes edge Rising portions 371a, 371b that wireline reel (Z axis) direction of coil 300 extends；From coiling guide table 22 and coiling guide table 22 to Top winding section 372b, 372b that second end sub-portion 72,74 extends in a generally horizontal direction.In addition, rising portions 371a, 371b phase May not be parallel for Z axis, it can also tilt.

The mutual interval top winding section 372b, 372b or the mutual clearance gap of rising portions 371a, 371b can be according to changes Characteristic required by depressor 10 changes.For example, passing through the mutual interval top winding section 372b, 372b or rising portions The mutual clearance gap of 371a, 371b can adjust the leakage field of secondary side coil.

On the other hand, as shown in figure 9, in the first coiling 38, first lead portion 38b is drawn from upper coil 301, from lower part Coil 302 draws first lead portion 38a respectively.First lead portion 38a, the 38b for being formed in the both ends of the first coiling 38 include edge Rising portions 381a, 381b that wireline reel (Z axis) direction of coil 300 extends；From coiling guide table 22 and coiling guide table 22 to Top winding section 382b, 382b that first end sub-portion 76,78 extends in a generally horizontal direction.In addition, rising portions 381a, 381b phase May not be parallel for Z axis, it can also tilt.

About the first coiling 38, can also by the mutual interval top winding section 382b, 382b or rising portions 381a, 381b that This clearance gap characteristic according to required by transformer 10 changes.For example, each other by top winding section 382b, 382b Interval or the mutual clearance gap of rising portions 381a, 381b, can adjust primary side coil leakage field.

As shown in figure 8, skeleton 20 has on the both ends of skeleton main body 21, the X-direction for being integrally formed in skeleton main body 21 The coiling guide table 22,23 in portion.Skeleton 20 is made of the plastics of such as PPS, PET, PBT, LCP, nylon etc., but also can use Other insulating elements are constituted.But in present embodiment, as skeleton 20, preferably by a height of 1W/mK of such as pyroconductivity Above plastics are constituted, such as are constituted using PPS, nylon etc..

The coiling guide table 22 of the upper end for being set to X-axis negative direction side in skeleton 20 has sidewall portion 221 and engaging Protrusion 224.Sidewall portion 221 is other than the X-axis negative direction side for drawing second leading part 37a, 37b, to surround coiling guiding The mode of the periphery of platform 22 is formed.As shown in Fig. 3 as top view, sidewall portion 221 can expand magnetic magnetic core 40a and second The insulation distance of leading part 37a, 37b.In coiling guide table 22, in the middle position of the Y direction in a pair of of engaging protrusion portion 224 It is formed with separation protrusion 223.Separation protrusion 223 is logical to separate the second leading part 37a and the second leading part 37b, can prevent the Two terminal shortcircuits of two coilings 37 (referring to Fig. 8).

As shown in Fig. 3 and Fig. 9, in a pair of of engaging protrusion portion 224, erected in rising portions 371a, 371b to Z-direction Two leading part 37a, 37b are wound in the part of top winding section 372a, 372b from X-axis negative direction side inwardly, prominent by engaging It rises and is oriented between portion 224, sidewall portion 221 and separation protrusion 223, and turn back again to the outside of X-axis negative direction.Second draws Line portion 37a, 37b turns back in coiling guide table 22 to X-direction, and thereby, it is possible to prevent from manufacturing medium middle coil 303 (ginseng According to Fig. 9) winding unlock.

In addition, as shown in Figures 1 and 3, second leading part 37a, 37b is returned to from coiling guide table 22 is fixed on encirclement bone The second end sub-portion 72,74 of the shell 90 of the periphery of frame 20, and be fixed on second end sub-portion 72,74 coiling interconnecting piece 72b, 74b。

The coiling guide table 23 of the upper end for being set to X-axis positive direction side in skeleton 20 also with coiling guide table 22 1 Sample has sidewall portion 231 and engaging protrusion portion 234.As shown in figure 3, the shape of coiling guide table 23 and coiling guide table 22 Shape is asymmetric, but the shape of coiling guide table 22,23 is not limited to shape shown in embodiment, it is possible to have phase Mutual symmetrical shape.

The sidewall portion 231 of coiling guide table 23 in addition to draw first lead portion 38a, 38b X-axis positive direction side other than, The mode for surrounding the periphery of coiling guide table 23 is formed.As the sidewall portion 221 of coiling guide table 22, sidewall portion 231 can Expand the insulation distance of magnetism magnetic core 40a and first lead portion 38a, 38b.In coiling guide table 23, in a pair of of engaging protrusion portion The middle position of 234 Y direction is formed with separation protrusion 233.Protrusion 233 is separated by by first lead portion 38a and first Leading part 38b is separated, and can prevent two terminal shortcircuits of the first coiling 38 (referring to Fig. 9).

As shown in Fig. 3 and Fig. 9, in a pair of of engaging protrusion portion 234, erected in rising portions 381a, 381b to Z-direction One leading part 38a, 38b is wound in the part of top winding section 382a, 382b from X-axis positive direction side inwardly (wireline reel side), By being oriented between engaging protrusion portion 234, sidewall portion 231 and separation protrusion 233, and again to the outside of X-axis positive direction It turns back.First lead portion 38a, 38b turns back in coiling guide table 23 to X-direction, and thereby, it is possible to prevent from manufacturing medium top And the winding of lower coil 301,302 (referring to Fig. 9) is unlocked.

In addition, as shown in Figures 2 and 3, first lead portion 38a, 38b is returned to from coiling guide table 23 is fixed on encirclement bone The first end sub-portion 76,78 of the shell 90 of the periphery of frame 20, and be fixed on first end sub-portion 76,78 coiling interconnecting piece 76b, 78b。

As shown in figs. 5 and 8, the both ends of the Z-direction for the winding canister portion 28 for being included in the skeleton main body 21 of skeleton 20, End spaced walls flange 24 and 25 is integrally formed substantially in parallel with X/Y plane in a manner of extending to the foreign side of radial direction. On the outer peripheral surface of winding canister portion 28 between the Z-direction for being located at end spaced walls flange 24 and 25, winding spaced walls are constituted The first volume of flange 26 around spaced walls flange 26a, volume Two around spaced walls flange 26b, third winding spaced walls flange 26c with to Diameter mode outstanding outward, forms at a predetermined interval along Z-direction.Using being formed in these end spaced walls flanges 24 and 25 Between first~third wind spaced walls flange 26a~26c, between these spaced walls flanges, from the lower section of Z-direction according to Division S1~the S4 of secondary formation as shown in Figure 5.In addition, winding spaced walls flange 26a~26c and the number for dividing S1~S4 do not have It is particularly limited to.

As shown in figure 5, dividing in S1, S4, the every several circles (5T in Fig. 5) of the first coiling 38 are continuously wound, and are formed with Portion's coil 301 and lower coil 302.In addition, dividing in S2, S3, the every several circles (5T in Fig. 5) of the second coiling 37 are continuously wound, Constitute middle coil 303.In present embodiment, the first volume around spaced walls flange 26a play by upper coil 301 and be wound in draw The effect for dividing the first layer of the middle coil 303 of S3 to separate along Z-direction.In addition, volume Two will around spaced walls flange 26b performance It is wound in the first layer for dividing the middle coil 303 of S3 and is wound in the second layer for dividing the middle coil 303 of S2 along Z-direction The effect separated.In addition, third winding spaced walls flange 26c plays lower coil 302 and is wound in the middle part line of division S2 The effect that the second layer of circle 303 is separated along Z-direction.

As shown in figure 5, being formed in division S1, S4 of the first coiling 38 winding of upper coil 301 and lower coil 302 It is set to enter the width of first coiling 38 in the Z-axis direction along the division width T1 of Z axis.But divide width T1 Also it can be set to the width for entering two in the Z-axis direction with the first above coiling 38.In addition, being divided in present embodiment Width T1 is preferred all identical, but can also be slightly different.

In addition, constituting the division width along Z axis of the second coiling 37 winding of middle coil 303 divided in S2, S3 T2 is set to the width for entering one in the Z-axis direction with the second coiling 37.But it divides width T2 and also can be set in Z axis Side is upwardly into two width with the second above coiling 37.In addition, in present embodiment, divide in S2, S3 along Z axis It is consistent with the line footpath of the second coiling 37 to divide width T2, it is preferably different from width T1 is divided, but can also be identical.

In present embodiment, the winding method for the first coiling 38 for dividing S1 and S4 is wound in as α winding, the first coiling 38 Wound since interconnecting piece 380 between first coil shown in Fig. 10 is by each division S1 and S4 shown in fig. 5, in each division S1 and S4 is formed after lower coil 302 and upper coil 301, is drawn to first lead portion 38a, 38b shown in Fig. 9.Therefore, as schemed Shown in 5 and Figure 10, the innermost layer of upper coil 301 and the innermost layer of lower coil 302 are connected using interconnecting piece 380 between first coil It connects.In addition, first lead portion 38a is from lower part as shown in figure 9, first lead portion 38b is drawn from the outermost layer of upper coil 301 The outermost layer of coil 302 is drawn.

In addition, the winding method for being wound in the second coiling 37 for dividing S2 and S3 is also α winding in present embodiment, the Two coilings 37 are wound since interconnecting piece 370 between the second coil shown in Fig. 10 is by each division S2 and S3 shown in fig. 5, each It divides S2 and S3 to be formed after middle coil 303, be drawn to the second leading part 37a, 37b shown in Fig. 9.Therefore, such as Fig. 5 and figure Shown in 10, divides the innermost layer of the middle coil 303 of S2 and divide the innermost layer of the middle coil 303 of S3 using between the second coil Interconnecting piece 370 connects.In addition, as shown in figure 9, the second leading part 37b from divide S2 middle coil 303 outermost layer draw, Second leading part 37a is drawn from the outermost layer for the middle coil 303 for dividing S3.

Here, being illustrated to α winding.Such as to 20 α of skeleton shown in Fig. 8 wind the first coiling 38 when, firstly, rolling up Around the part (end of the X-axis negative direction side of skeleton main body 21) of a part of notch of the circumferential direction of spaced walls flange 26, pass through first Division S1 shown in fig. 5 is connect by interconnecting piece 380 between the first coil of coiling 38 with S4 is divided.Then, close to first lead portion A part of first coiling 38 of the side of 38a is wound in the outer of winding canister portion 28 on the inside edge for dividing S4 with for example rotating to the right Week.In addition, close to the side of first lead portion 38b first coiling 38 another part the inside for dividing S1 along with divide S1 The opposite direction of coiling direction (or being also possible to same direction) is wound in the periphery of winding canister portion 28.In addition, these operations Automatic coil winding machine progress can be used.

It is shown in fig. 5 to be wound in the second coiling 37 for dividing S2, S3 by interconnecting piece between the second coil of the second coiling 37 370 are configured at the part (end of the X-axis positive direction side of skeleton main body 21 of a part of notch of circumferential direction of winding spaced walls flange 26 Portion) front and back, the first insulating boot 81 is assemblied in skeleton main body 21.After the assembly of first insulating boot 81, close to the second leading part 37a Side the second coiling 37 a part in the inside for dividing S3 along be wound in winding canister portion 28 periphery with for example rotating to the right. Meanwhile close to another part of the second coiling 37 of the side of the second leading part 37b on the inside edge and the volume of division S3 for dividing S2 Around contrary direction (or being also possible to same direction), it is wound in the periphery of winding canister portion 28.In addition, these operations can also To use automatic coil winding machine to carry out.

As shown in figure 8, distinguishing at the both ends of the X-direction of the end spaced walls flange 25 for the lowest part for being located at Z-direction It is formed with exoskeleton leg 29.Each exoskeleton leg 29 is from the both ends of the X-direction of end spaced walls flange 25 to Z-direction Lower section protrusion is formed.Each pedestal 86 shown in fig. 5 is accommodated in each exoskeleton leg 29.

As shown in figure 8, first~third winding spaced walls flange 26a, 26b, 26c 22 side of coiling guide table, with than The narrower width of the Y direction width of first insulating boot 81 forms notch 264a, 264b, 264c.In addition, the first volume around The downside surface of the Z-direction of bulkhead flange 26a is formed in the circumferential position for being formed with notch 264a and is not penetrated in Z axis The ream face 261a in direction.In addition, the uper side surface of the Z-direction in third winding spaced walls flange 26c, is being formed with notch The circumferential position of 264c is formed with the ream face 261c being not penetrated in Z-direction.

Along ream face 261a and 261c, the first insulating boot 81 is installed on the first volume and winds around spaced walls flange 26a and third Between spaced walls flange 26c, and close notch 264a, 264c.As shown in figure 5, the first insulating boot 81 is for will such as first Interconnecting piece 380 insulate with middle coil 303 between coil.

As shown in figure 8, to include first part's flange 811, second part flange 812, middle section convex for the first insulating boot 81 Edge 813, upper section flange 814, middle section cylinder 815 (referring concurrently to Fig. 5), vertical component effect 816.

As shown in figure 5, middle section cylinder 815 constitutes a part of the cylinder of the second coiling 37 winding.In addition, such as cuing open Shown in Fig. 5 of view, the other parts of cylinder are made of the winding canister portion 28 of skeleton 20.That is, middle section cylinder 815 is from outside diameter It is overlapped setting with a part of the winding canister portion 28 of skeleton 20, that is, repeating portion 28a, other portions with the winding cylindrical portion of skeleton 20 Divide i.e. non-repeating unit 28b combination and constitute cylinder, in the innermost layer of the periphery of cylinder winding middle coil 303.Such as Fig. 5 institute Show, interconnecting piece 380 between the inner peripheral surface clamping first coil of middle section cylinder 815, and the repetition with the winding canister portion 28 of skeleton 20 The outer peripheral surface of portion 28a is opposite.In this way, the side of interconnecting piece 380 and the second coiling 37 (middle coil 303) between first coil is isolated Formula, Jie set the first insulating boot 81, and thereby, it is possible to be reliably achieved the insulation of the two.

As shown in figs. 5 and 8, first part's flange 811 and second part flange 812 are respectively in the Z of middle section cylinder 815 The one end and the other end of axis direction is formed parallel to X/Y plane.As shown in figure 8, the Y in the upper surface of first part's flange 811 Axis direction both ends are formed with ream face 811a.Ream face 811a with scheduled Y direction width, and to X-direction extension to make a reservation for The mode of distance is formed.Ream face 811a is overlapped and contacts around the ream face 261a of spaced walls flange 26a with the first volume.In second part The Y direction both ends of the lower surface of flange 812 are formed with ream face 812a.Ream face 812a with scheduled Y direction width, and The mode for extending preset distance to X-direction is formed.Ream face 812a is overlapped with the ream face 261c of third winding spaced walls flange 26c And it contacts.

Middle section flange 813 by first part's flange 811 and second part flange 812 in a manner of being clamped, in centre The substantially central portion of the Z-direction of part cylinder 815 is formed parallel to X/Y plane.In example illustrated, middle section flange 813 It is separated into two parts of Y direction side and the Y direction other side.

Vertical component effect 816 is with scheduled Y direction width, and from the upper surface of first part's flange 811 to Z-direction The mode of extension is formed.Vertical component effect 816 has scheduled Z-direction width, is formed in the Y direction central portion of vertical component effect 814 There is the protrusion for configuring rising portions 371a, 371b of second leading part 37a, 37b separated from each other.Upper section flange 814 connect with the Z axis positive direction end of vertical component effect 816, and are formed parallel to X/Y plane.

As shown in figure 5, vertical component effect 816 is by rising portions 371a, 371b of second leading part 37a, 37b and by first Divide the first coiling 38 of the top of flange 811 to separate the mode to insulate to be formed.In this way, by the second coiling 37 is isolated The mode of (middle coil 303) and the first coiling 38 (upper coil 301 and lower coil 302), Jie set the first insulating boot 81, energy Enough it is reliably achieved the insulation of the two.

In addition, matching between the second coiling 37 (first layer of middle coil 303) and the first coiling 38 (upper coil 301) First part's flange 811 and vertical component effect 816 are set, does not make transformer 10 enlarged as a result, it will be able to substantially ensure the second coiling 37 With the creepage distance between the first coiling 38.

In addition, by the second coiling 37 (second layer of middle coil 303) and the first coiling 38 (lower coil 302) it Between configure second part flange 812, do not make transformer 10 enlarged, it will be able to substantially ensure the second coiling 37 and the first coiling 38 Between creepage distance.

As shown in figure 5, being clamped by upper section flange 814, first part's flange 811 and end spaced walls flange 24 In region, the upper coil 301 of the first coiling 38 is configured.As shown in figure 5, upper section flange 814 will be will form upper coil 301 the first coiling 38 is isolated with second leading part 37a, 37b of the second coiling 37 of the top by upper section flange 814 Mode formed.In this way, second leading part 37a, 37b of the first coiling 38 (upper coil 301) and the second coiling 37 is isolated Mode, Jie sets the first insulating boot 81, the insulation that thereby, it is possible to both be reliably achieved.

In addition, by second leading part 37a, 37b (top winding section 372a, 372b) in the second coiling 37 with first around Upper section flange 814 is configured between line 38 (upper coil 301), does not make transformer 10 enlarged, it will be able to substantially ensure the Creepage distance between second leading part 37a, 37b and the first coiling 38 of two coilings 37.

As shown in figure 8, the first insulating boot 81 is connected in the ream face 811a that skeleton 20 is fixed as first part's flange 811 The ream face 261a of one winding spaced walls flange 26a, and the ream face 812a of second part flange 812 is connected to third winding spaced walls The ream face 261c of flange 26c simultaneously can be slidably inserted into.As shown in figure 5, interconnecting piece 380 passes through between first coil in present embodiment The inside of middle coil 303, but as shown in figure 5, interconnecting piece 380 and middle coil 303 utilize the first insulating boot between first coil 81 middle section cylinder 815 reliably insulate.

In addition, in 23 side of coiling guide table of first and third winding spaced walls flange 26a, 26c, shown in installation diagram 8 The second insulating boot 82 mode, form notch (referring to Fig. 5).As shown in figure 5, the second insulating boot 82 is used for the first coiling The rising portions 381a of 38 first lead portion 38a and middle coil 303 insulate, and by middle coil 303 and upper coil 301 And lower coil 302 insulate.

As shown in figure 8, the second insulating boot 82 has the of the both ends for being formed in parallel at its Z-direction on XY axial plane A part of flange 821 and second part flange 822, wall portion 823.As shown in figure 5, the second insulating boot 82 is by first and second part Flange 821,822 is embedded in the notch for being formed in first and third winding spaced walls flange 26a, 26c of 23 side of coiling guide table, Make first and second ribbed portion 821,822 and 22 side of coiling guide table is formed in first and third winding spaced walls flange The ream face of 26a, 26c abut and are slidably inserted into, and are fixed on skeleton 20 as a result,.

As shown in figure 5, in the first lead portion 38a (rising portions 381a) of the first coiling 38 is drawn to the top of coil On the way, in a manner of being isolated with middle coil 303, it is situated between rising portions 381a and middle coil 303 and sets the second insulating boot 82, by This, can be reliably achieved the insulation of the two.

In addition, in a manner of upper coil 301 and lower coil 302 and middle coil 303 is isolated, in upper coil 301 And be situated between lower coil 302 and middle coil 303 and set the second insulating boot 82, thereby, it is possible to be reliably achieved the insulation of the two.

These first and second insulating boots 81,82 utilize the insulating element structure of plastics identical or different with skeleton 20 etc. At.Insulating boot 81,82 is dividually shaped with skeleton 20, and is installed on circumferential a part of skeleton 20.

In present embodiment, magnetism magnetic core 40a, 40b shown in Fig. 4 are same shape, have section E font in the section ZY Shape constitutes so-called E-type magnetic core.Magnetic magnetic core 40a, 40b divide magnetic core, but magnetic made of still cutting off in parallel with XZ plane Property magnetic core 40a, 40b be not limited to segmentation magnetic core.In addition, the shape of magnetic magnetic core 40a, 40b are also not limited to E-type magnetic Core is also possible to other shapes of magnetic magnetic core.

As shown in figure 4, in the case where magnetic magnetic core 40a, 40b are set as segmentation magnetic core, it can also will be by covering magnetic core The part of the upper surface of 40a and by the gap between magnetic core 40a, 40b (middle leg 46a, 46b) of segmentation under Z-direction The heat transmission top plate that the part that side extends is constituted is set to magnetic magnetic core 40a, 40b.Thereby, it is possible to effectively improve transformer 10 Thermal diffusivity.

As shown in figure 4, the magnetic magnetic core 40a for being configured at the upside of Z-direction includes the base portion extended along the y axis 44a, from the both ends of the Y direction of base portion 44a to a Z-direction opposite side outstanding leg 48a, these side legs 48a it Between from the center of Y direction to Z-direction middle leg 46a outstanding.It is configured at the magnetic magnetic core 40b tool of the downside of Z-direction Have: the base portion 44b that extends along the y axis, from the both ends of the Y direction of base portion 44b to a Z-direction contralateral leg outstanding Portion 48b, the center between the 48b of these side legs from Y direction are to Z-direction middle leg 46b outstanding.

Middle leg 46a is inserted into the inside of the magnetic core leg through hole 21a of skeleton 20 from the upside of Z-direction.Equally, middle leg Portion 46b is inserted into the inside of the magnetic core leg through hole 21a of skeleton 20 from the downside of Z-direction, in magnetic core leg with through hole 21a's Inside is constituted in the mode that their front end face is opposite.In addition, the front end of middle leg 46b is used in magnetic core leg in example illustrated The preceding end in contact of the inside of through hole 21a and middle leg 46a, but can also be before the front end of middle leg 46a and middle leg 46b Scheduled gap (illustration omitted) is formed between end.In this way, by forming gap, it can be special according to the width adjustment leakage field in gap Property.

Middle leg 46a and middle leg 46b by with magnetic core leg with the inner peripheral surface shape of through hole 21a it is consistent in a manner of, have Generally oblong post shapes, but its shape is not particularly limited, and can also be become according to magnetic core leg with the shape of through hole 21a Change.In addition, side leg 48a, 48b have the consistent inside concave curve surface shape of outer peripheral surface shape with skeleton main body 21, appearance Face has the plane parallel with X-Z plane.In present embodiment, the material of each magnetic core 40a, 40b can enumerate metal, ferrite etc. Soft magnetic material, but be not particularly limited.

As shown in figure 4, side cover is respectively configured between the inner peripheral surface of side leg 48a, 48b and the outer peripheral surface of skeleton main body 21 50.Side cover 50 has the cover main body of the periphery of the skeleton main body 21 between coiling guide table 22,23 in covering skeleton 20 52.The cover main body from the periphery of covering skeleton main body 21 is formed at the both ends of the Z-direction of the cover main body 52 of side cover 50 52 are bent into the hooking sheet 54 of generally vertical direction to skeleton main body 21.It is formed in the one of the two sides of the Z-direction of cover main body 52 To being installed in a manner of the upper and lower surface of Z-direction of the hooking sheet 54 to sandwich skeleton main body 21.

In addition, being integrally formed the side leg extended along Z-direction in the both ends outer surface of the X-direction of cover main body 52 Guide pin 56.The outer surface of the inner surface of side leg 48a, 48b and the cover main body 52 between a contralateral leg guide pin 56 connects Touching, the movement of the X-direction of side leg 48a, 48b are limited by a contralateral leg guide pin 56.These side covers 50 utilize and skeleton 20 The insulating element or metal of same plastics etc. are constituted.

Fig. 6 is shell 90, bottom plate 92 and the portion of terminal for being fixed on shell 90 for indicating transformer 10 shown in FIG. 1 and being included 70 perspective view.Above-mentioned skeleton 20, coil 300 and magnetism magnetic core 40a, 40b are contained in the inside of shell 90.In shell 90 Opposite a pair of of side is respectively formed with first terminal setting unit 98 and Second terminal setting unit 97.First terminal setting unit 98 and The wall of Second terminal setting unit 97 is thicker than the wall of other parts of shell 90, has in the side of X-axis positive direction side First terminal setting unit 98 is fixed with first end sub-portion 76,78, in the Second terminal setting that the side of X-axis negative direction side has Portion 97 is fixed with second end sub-portion 72,74.

Fig. 7 is the perspective view for indicating to be fixed on the portion of terminal 70 of shell 90.First end sub-portion 76 that there are two the tools of portion of terminal 70, 78, the metal terminal of four separation of two second end sub-portions 72,74.In addition, first end sub-portion 76,78 and second end sub-portion 72,74 four metal terminal mutually insulateds.Additionally, it is preferred that first end sub-portion 76,78 and second end sub-portion 72,74 are led using good The production such as metal material of body.As shown in fig. 6, the first end of first end sub-portion 76,78 and second end sub-portion 72,74 in shell 90 Sub- setting unit 98 and Second terminal setting unit 97 and shell 90 integrally insert part forming.But first end sub-portion 76,78 and second Portion of terminal 72,74 is not limited to insert part forming to the fixing means of shell 90, can also pass through bonding or spiral shell admittedly etc. other Method, first end sub-portion 76,78 and second end sub-portion 72,74 are fixed on shell 90.

As shown in Fig. 2, first end sub-portion 76,78 is fixed at the both ends of the first coiling 38.As shown in fig. 7, first terminal Portion 76 include the first terminal fixed part 76a as terminal fixing part, the first coiling interconnecting piece 76b as coiling interconnecting piece, The first external connecting 76c as external connecting.The first terminal setting unit 98 of first terminal fixed part 76a and shell 90 It contacts and fixed.First terminal fixed part 76a is fixed on shell 90 by insert part forming, therefore, in Fig. 1 and as shown in Figure 2 Assembled state under, embedment constitute shell 90 resin inside.

First coiling interconnecting piece 76b of first end sub-portion 76 shown in Fig. 7 prolongs from first terminal fixed part 76a to side It stretches, and connects the first lead portion 38a of the first coiling 38 (referring to Fig. 2 and Fig. 3).One end, that is, first lead of first coiling 38 Portion 38a and the first coiling interconnecting piece 76b fusing (one kind of thermo-compression bonding), but first lead portion 38a to the first coiling interconnecting piece The fixing means of 76b is not particularly limited.

First external connecting 76c of first end sub-portion 76 shown in Fig. 7 prolongs from first terminal fixed part 76a to the other side It stretches, the wiring path of the outside other than transformer 10 can be connected.The first external connecting 76c installation for example transformer 10 it Afterwards, bus (stubs) or coiling etc. are connected by welding other methods, but the shape of the first external connecting 76c and to first The wiring method of external connecting 76c is not limited to embodiment.

First end sub-portion 78 is as first end sub-portion 76, comprising: the first terminal fixed part as terminal fixing part 78a, as the first coiling interconnecting piece 78b of coiling interconnecting piece, as the first external connecting 78c of external connecting.First In portion of terminal 78, the other end i.e. first lead portion 38b of the first coiling 38 is fixed in the first coiling interconnecting piece 78b.First The specific shape of portion of terminal 78 is different from first end sub-portion 76, but the function in each portion and outline structure are the same, therefore, to detailed It omits the description.In addition, first end sub-portion 76 and first end sub-portion 78 can also be as shown in fig. 7, shape be different, but first terminal Portion 76 and first end sub-portion 78 or the same shape, it is possible to have symmetrical shape.

As shown in Figure 1, being fixed in second end sub-portion 72,74: the both ends of the second coiling 37.As shown in fig. 7, second end Sub-portion 72 has the Second terminal fixed part 72a as terminal fixing part, the second coiling interconnecting piece as coiling interconnecting piece 72b, the second external connecting 72c as external connecting.The Second terminal of Second terminal fixed part 72a and shell 90 is arranged Portion 97 contacts and fixes.Second terminal fixed part 72a is fixed as first terminal fixed part 76a, 78a by insert part forming In shell 90, therefore, under assembled state in Fig. 1 and as shown in Figure 3, embedment constitutes the inside of the resin of shell 90.

Second coiling interconnecting piece 72b of second end sub-portion 72 shown in Fig. 7 prolongs from Second terminal fixed part 72a to side It stretches, and connects the second leading part 37a (referring to Fig.1 and Fig. 3) of the second coiling 37.The one end of second coiling 37 i.e. the second lead Portion 37a and the second coiling interconnecting piece 72b fusing (one kind of thermo-compression bonding), but the second leading part 37a to the second coiling interconnecting piece The fixing means of 72b is not particularly limited.

Second external connecting 72c of second end sub-portion 72 shown in Fig. 7 prolongs from Second terminal fixed part 72a to the other side It stretches, and the wiring path to outside other than transformer 10 can be connected.Such as transformer 10 is installed to the second external connecting 72c Later, bus (stubs) or coiling etc. are connected by welding other methods, the shape of the second external connecting 72c and to the The wiring method of two external connecting 72c is not limited to embodiment.

Second end sub-portion 74 is as second end sub-portion 72, comprising: the Second terminal fixed part as terminal fixing part 74a, as the second coiling interconnecting piece 74b of coiling interconnecting piece, as the second external connecting 74c of external connecting.Second In portion of terminal 74, the other end i.e. the second leading part 37b of the second coiling 37 is fixed in the first coiling interconnecting piece 74b.Second The detail shape of portion of terminal 74 is different from second end sub-portion 72, but the function in each portion and outline structure are the same, therefore, saves to detailed Slightly illustrate.In addition, first end sub-portion 72 can also be with shape difference with first end sub-portion 74, and it can also be identical, it can also be mutually right Claim.

Such as according to Fig. 3 of transformer 10 viewed from above it is understood that first end sub-portion 76,78 and second end sub-portion 72, 74 first coiling interconnecting piece 76b, 78b and second coiling interconnecting piece 72b, 74b is configured at viewed from above outer than shell 90 Week is in the outer part.In this way, by the way that first coiling interconnecting piece 76b, 78b and second coiling interconnecting piece 72b, 74b to be configured at and compare shell 90 periphery in the outer part, can make the insulation of each portion of terminal reliable, and by 10 low level of transformer.In addition, connecting outside first Socket part 76c, 78c be configured at than shell 90 periphery in the outer part, the second external connecting 72c, 74c is configured at outer than shell 90 Week in the inner part, as long as but the configuration of the first external connecting 76c, 78c and the second external connecting 72c, 74c swimmingly carry out The configuration of wiring operation after installation, is just not particularly limited.

The transformer 10 of present embodiment winds the second coiling by assembling each component shown in Fig. 2, and to skeleton 20 37 and first coiling 38 and manufacture.Hereinafter, illustrating an example of the manufacturing method of transformer 10 using Fig. 4 etc..The system of transformer 10 In work, firstly, preparing skeleton 20.The material of skeleton 20 is not particularly limited, but skeleton 20 is formed by the insulating materials of resin etc..

Then, first coiling 38 is wound to the periphery of the winding canister portion 28 of skeleton 20 by α winding, forms top Coil 301 and lower coil 302.As the first coiling 38 of the formation for upper coil 301 and lower coil 302, do not have It is particularly limited to, but it is preferable to use litz wires (twisted wire) etc..

Then, the first insulating boot 81 is assembled to the skeleton 20 for being wound with the first coiling 38.In addition, the first insulating boot 81 can also To be assemblied in skeleton 20 before the first coiling 38 is wound in the periphery of skeleton 20.

Then, the second coiling 37 is wound in the periphery of the winding canister portion 28 of skeleton 20, forms middle coil 303.From middle part Coil 303 draws second leading part 37a, 37b to wireline reel top, and is locked to coiling guide table 22.As for middle part Second coiling 37 of the formation of coil 303, can also be identical as the first coiling 38, can also be different.

In addition, assemble the second insulating boot 82 to skeleton 20, from upper coil 301 and lower coil 302 by first lead portion 38a, 38b are locked to coiling guide table 23 to extraction above wireline reel.In addition, the second insulating boot 82 can also be by first Coiling 38 is assemblied in skeleton 20 before being wound in the periphery of skeleton 20.

Then, side cover 50 is installed on to the two sides of the Y direction of skeleton 20, then, is installed from the up and down direction of Z-direction Magnetic magnetic core 40a, 40b.That is, being kept as needed between the front end of middle leg 46a, 46b of magnetic magnetic core 40a, 40b Gap, and the front end of side leg 48a, 48b are engaged with each other.As the material of magnetic magnetic core 40a, 40b, metal, iron can be enumerated The soft magnetic material of oxysome etc., but be not particularly limited.

Then, pedestal 86 is contained in the inside of exoskeleton leg 29.In addition, pedestal 86 can also be with assembled in advance in skeleton leg Portion 29.In addition, skeleton 20 and magnetism magnetic core 40a, 40b additionally prepare to be fixed with first end sub-portion 76,78 and second end sub-portion 72, 74 shell 90 (referring to Fig. 6).The shell 90 of first end sub-portion 76,78 and second end sub-portion 72,74 is fixed with for example, by embedding Part is shaped and is made.In addition, bottom plate 92 is fixed on the bottom peristome of shell 90 by bonding etc..

Then, as shown in fig. 6, the shell 90 open on top accommodates above-mentioned skeleton 20, the first coiling 38, the second coiling The assembly of 37 and magnetic magnetic core 40a, 40b etc., and heat transmission resin is filled to the inside of shell 90, form resin 88.Separately Outside, the front end of first lead portion 38a, 38b are linked to first coiling interconnecting piece 76b, 78b of first end sub-portion 76,78, by The front end of two leading part 37a, 37b is linked to second coiling interconnecting piece 72b, 74b of second end sub-portion 72,74, obtains this as a result, The transformer 10 of embodiment.

First lead portion 38a, 38b and second leading part 37a, 37b and first coiling interconnecting piece 76b, 78b and the second coiling The connection of interconnecting piece 72b, 74b can be implemented for example, by following such fusing process.That is, in fusing process, firstly, by the The front end of one leading part 38a, 38b is temporarily fixed on first coiling interconnecting piece 76b, 78b, before second leading part 37a, 37b End is temporarily fixed on second coiling interconnecting piece 72b, 74b.Be fixed temporarily by carrying out as follows, by first lead portion 38a, 38b and The front end of second leading part 37a, 37b is utilized by first coiling interconnecting piece 76b, 78b and second coiling interconnecting piece 72b, 74b First coiling interconnecting piece 76b, 78b and second coiling interconnecting piece 72b, 74b sandwich first lead portion 38a, 38b and the second leading part 37a,37b.When being fixed temporarily, the front end for removing first lead portion 38a, 38b and second leading part 37a, 37b is not needed The insulating wrapped divided, the stage after being fixed temporarily process, the first coiling 38 and the second coiling 37 and first end sub-portion 76,78 And second end sub-portion 72,74 can also be not turned on.

It is fixed temporarily after process, by will sandwich first lead portion 38a, 38b and second leading part 37a, 37b first Coiling interconnecting piece 76b, 78b and second coiling interconnecting piece 72b, 74b is sandwiched using the electrode (head) of fever, on one side to the first coiling The resistance heating of interconnecting piece 76b, 78b and second coiling interconnecting piece 72b, 74b transmitting electrode flattens on one side, and carries out thermo-compression bonding work Sequence (hot riveting).In hot pressing process, the insulation of the front end portion of first lead portion 38a, 38b and second leading part 37a, 37b Coat conducting wire and the first coiling interconnecting piece due to the inside by first lead portion 38a, 38b and second leading part 37a, 37b 76b, 78b and second coiling interconnecting piece 72b, 74b be powered and the resistance heating that generates and be removed.In addition, thermo-compression bonding work In sequence, exposed by the insulating wrapped of the front end portion of removing first lead portion 38a, 38b and second leading part 37a, 37b Conducting wire and first coiling interconnecting piece 76b, 78b and second coiling interconnecting piece 72b, 74b carry out heating crimping, each coiling and metal Terminal is electrical and physically links.

It is to press from both sides middle coil 303 using upper coil 301 and lower coil 302 in the transformer 10 of present embodiment The structure (sandwich structure) held.Therefore, the coupling between these coil parts, the stabilization of Magnetic leakage characteristics easy to accomplish be can be improved Change.In addition, can be realized the transformer 10 even if the high coupling that in high band, can also obtain stable Magnetic leakage characteristics.

Especially in the transformer 10 of present embodiment, the second coiling 37 carries out α winding to skeleton 20.Even if α winding increases Great circle number can also reduce the number of plies of winding axis direction, therefore, facilitate low level, the miniaturization of transformer 10.In addition, By being set as α winding, the coiling from winding central part, which is drawn, to disappear, and therefore, the second coiling 37 will not be overlapped, and therefore, be helped In the low level of transformer 10.

In addition, by being set as α winding, facilitating the stabilisation of Magnetic leakage characteristics in middle coil 303.In addition, being also easy Make the circle number of coil identical between the first layer of middle coil 303 and the second layer, in addition, being also easy to make to enclose number variation.

In addition, upper coil 301 and lower coil 302 are continuously formed using the first coiling 38.By being set as this knot Structure can prevent electric current to be biased to the circulation of either upper coil 301 and lower coil 302.Electric current is prevented to be biased to circulation, because This, can prevent 302 abnormal heating of upper coil 301 or lower coil of either one.In addition, being constituted from using different coilings The case where upper coil 301 and lower coil 302, is compared, can shorten constitute the first of upper coil 301 and lower coil 302 around Line around wire length, copper loss mistake can be reduced.If copper loss mistake can be reduced, efficiency can be improved, and also reduce fever.

In addition, the coefficient of coup of primary coil and secondary coil is higher in transformer 10, therefore, even if in primary coil Circle number and the circle number of secondary coil it is substantially different in the case where, the also stabilisation of Magnetic leakage characteristics easy to accomplish.That is, according to this reality Apply mode, though upper coil 301 and lower coil 302 the first coiling 38 circle number and middle coil 303 second around In the case that the circle number of the circle number of line 37 is bigger, effect is also larger.Specifically, even if the first coiling 38 total circle number In the case that the circle number ratio n1/n2 of n1 and the circle number n2 of the second coiling 37 are 2 or more, 3 or more, 5 or more, also it can be obtained more significant Effect.

In addition, first coiling 38 carries out α winding to skeleton 20 in transformer 10.By being set as this structure, it is able to use The upper coil 301 and lower coil 302 discretely configured in the single winding axis direction easy to form of the first coiling 38.Separately Outside, it is also easy that the circle number of coil is set as identical in upper coil 301 and lower coil 302, in addition, being also easy to make to enclose number change Change.

Even if in addition, α winding increases circle number therefore the number of plies that can also reduce winding axis direction facilitates transformer 10 Low level, miniaturization.In addition, the coiling from winding central part, which is drawn, to disappear, and therefore, coiling is not by being set as α winding It can be overlapped, therefore, facilitate the low level of transformer 10.

Transformer 10 by using the first insulating boot 81 shown in Fig. 8, can by keep the first coiling 38 and second around The insulation of line 37 and can structure easy to manufacture realize Fig. 5 and the sandwich that first coiling 38 as shown in Figure 8 is formed Structure.In addition, as shown in figure 5, transformer 10 using by upper coil 301 and lower coil 302 using axially passing through in The structure that interconnecting piece 380 connects between the first coil of the internal side diameter of portion's coil 303, is advantageous accordingly, with respect to miniaturization.

In addition, transformer 10 accommodates skeleton 20 in the shell 90 filled with resin 88, therefore, thermal diffusivity is excellent, in addition, First and second portion of terminal 72,74,76,78, which is fixed on, is directly mounted to external shell 90, therefore, relative to other devices When installation, the position difference of first and second portion of terminal 72,74,76,78 is less.

For example, in the existing transformer of the type of skeleton setting terminal base, due to the scale error of skeleton, skeleton The influence of installation error to shell, the strain of dilation with heat transmission resin etc., has portion of terminal when installation Position precision unevenness problem.But first and second portion of terminal 72,74,76,78 is fixed on the transformer 10 of shell 90 In, it can reduce or exclude the scale error of skeleton 20, the installation error to shell 90 of skeleton 20, the expansion with resin 88 It is influenced caused by the position precision first and second portion of terminal 72,74,76,78 such as strain of contraction.Therefore, transformer 10 Heat dissipation characteristics are excellent, and to when the installation of other devices, can configure first and second portion of terminal 72,74,76,78 in high precision.In addition, Transformer 10 in the mounted state, configures first and second portion of terminal 72,74,76,78 in high precision, therefore, being capable of rapid and appearance It changes places and carries out the wiring operation relative to external connecting 72c, 74c, 76c, 78c progress after mounting.

In addition, first and second 72,74,76,78 insert part forming of portion of terminal is in shell 90 in transformer 10.This transformation Device 10 can further improve the position precision of first and second portion of terminal 72,74,76,78, in addition, Nian Jie with portion of terminal is passed through Or spiral shell the case where being fixed admittedly, is compared, and assembling is easy.The installation site of first and second portion of terminal 72,74,76,78 is without spy It does not limit, but the first end sub-portion 76,78 for connecting the first coiling 38 is fixed on to the side of shell 90, and the second coiling will be connected 37 second end sub-portion 72,74 is fixed on the other side of shell 90, and transformer 10 realizes good insulation characterisitic as a result,.

In addition, first and second portion of terminal 72,74,76,78 include from embedment shell 90 terminal fixing part 72a, 74a, Coiling interconnecting piece 72b, 74b, 76b, 78b that the side of 76a, 78a extend；From the another of terminal fixing part 72a, 74a, 76a, 78a External connecting 72c, 74c, 76c, 78c that side extends.This transformation with first and second portion of terminal 72,74,76,78 Device 10 is easy the wiring operation carry out after mounting relative to external connecting 72c, 74c, 76c, 78c, in addition, also can Prevent the heat when wiring operation relative to external connecting 72c, 74c, 76c, 78c be transferred to coiling interconnecting piece 72b, 74b, The problem of 76b, 78b.In addition, as shown in Figures 1 and 2, transformer 10 is dashed forward upwards with external connecting 72c, 74c, 76c, 78c Mode out configures, and the wiring operation carried out relative to external connecting 72c, 74c, 76c, 78c after making installation as a result, is more held Easily.

In addition, in transformer 10, the end of the first coiling 38 and the second coiling 37 relative to first and second portion of terminal 72, 74,76,78 fusing, therefore, manufacture are easy, and with the first coiling 38 and the second coiling 37 and first and second portion of terminal 72,74, 76, the relevant high reliablity of 78 connection.In addition, can be compared by coiling interconnecting piece 72b, 74b, 76b, 78b that fusing is formed The interconnecting piece of screw has been used to reduce size, therefore, transformer 10 is advantageous on low level and the viewpoint of miniaturization.This Outside, it by drawing coiling interconnecting piece 72b, 74b, 76b, 78b from the outer circumferential horizontal direction of shell 90, can be effectively performed The fusing process of the manufacture of transformer 10.

In addition, various changes can be carried out within the scope of the invention the present invention is not limited to above-mentioned embodiment.

Such as the other way to the periphery of skeleton 20 assembly coil 300, it is also contemplated that first by the second coiling volume 37 It is around in skeleton 20, and constitutes middle coil 303, then, the first coiling 38 is wound in skeleton 20, and constitutes upper coil 301 And the mode of lower coil 302.In the case where coil 300 is assemblied in skeleton 20 in this way, connected between first coil Portion 380 passes through the outside of middle coil 303.

In addition, the relationship of above-mentioned primary coil and secondary coil may be reversed.That is, can also be constituted with the first coiling 38 Secondary coil, and the second coiling 37 constitutes primary coil.In addition, in this case, the size relation of the outer diameter of each coiling can also With opposite with above-mentioned example.Or, the outer diameter of these coilings can also be identical.

Symbol description

10 ... transformers

20 ... skeletons

21 ... skeleton main bodys

21a ... magnetic core leg through hole

22,23 ... coiling guide tables

221,231 ... sidewall portions

223,233 ... separation protrusions

224,234 ... engaging protrusion portions

24,25 ... end spaced walls flanges

26 ... winding spaced walls flanges

26a ... the first volume is around spaced walls flange

26b ... volume Two is around spaced walls flange

26c ... third winds spaced walls flange

261a, 261c ... ream face

264a, 264b, 264c ... notch

28 ... winding canister portions

28a ... repeating portion

28b ... non-repeating unit

29 ... exoskeleton legs

300 ... coils

301 ... upper coils

302 ... lower coils

303 ... middle coils

37 ... second coilings

The second leading part of 37a, 37b ...

Interconnecting piece between 370 ... second coils

371a, 371b ... rising portions

The top 372a, 372b ... winding section

38 ... first coilings

38a, 38b ... first lead portion

381a, 381b ... rising portions

The top 382a, 382b ... winding section

Interconnecting piece between 380 ... first coils

The magnetic magnetic core of 40a, 40b ...

44a, 44b ... base portion

The middle leg 46a, 46b ...

The side 48a, 48b ... leg

50 ... side covers

52 ... cover main bodies

54 ... hooking sheets

56 ... side leg guide pins

70 ... portion of terminal

72,74 ... second end sub-portions

76,78 ... first end sub-portions

72a, 74a, 76a, 78a ... terminal fixing part

72b, 74b, 76b, 78b ... coiling interconnecting piece

72c, 74c, 76c, 78c ... external connecting

86 ... pedestals

81 ... first insulating boots

811 ... first part's flanges

812 ... second part flanges

811a, 812a ... ream face

813 ... middle section flanges

814 ... upper section flanges

815 ... middle sections cylinder

816 ... vertical component effects

82 ... second insulating boots

821 ... first part's flanges

822 ... second part flanges

823 ... wall portions

88 ... resins

90 ... shells

98 ... first terminal setting units

97 ... Second terminal setting units

92 ... bottom plates

Claims

1. a kind of coil device, which is characterized in that

It includes

Skeleton is wound with coiling；

Shell accommodates the skeleton and installs to outside；

Resin is filled in the gap of the skeleton Yu the shell；And

Portion of terminal is fixed on the shell and is connected with the coiling.

2. coil device according to claim 1, wherein

The shell and the portion of terminal integrally insert part forming.

3. coil device according to claim 1, wherein

The coiling have the first coiling and with discontinuous second coiling of first coiling,

First coiling forms the upper coil configured separated from each other along the wireline reel of the skeleton and lower coil,

Second coiling forms the middle coil of α winding between the upper coil and the lower coil.

4. coil device according to claim 1, wherein

First coiling is to form the upper coil configured separated from each other along the wireline reel of the skeleton and lower coil Mode α be wound in the skeleton,

Second coiling forms middle coil between the upper coil and the lower coil.

5. coil device according to claim 1, wherein

The portion of terminal includes first end sub-portion, is connected with first coiling；And second end sub-portion, it is set to institute State in shell with the opposite side in side that the first end sub-portion is set and be connected with second coiling.

6. coil device according to claim 1, wherein

The portion of terminal includes terminal fixing part, contacts and fixes with the shell in the portion of terminal；Coiling connection Portion extends from the terminal fixing part to side and is connected with the coiling；And external connecting, it is solid from the terminal Determine portion to extend to the other side.

7. coil device according to claim 1, wherein

The end of the coiling is blown relative to the portion of terminal.

8. coil device according to any one of claims 1 to 7, wherein

The portion of terminal has the coiling interconnecting piece for being connected with the coiling,

The coiling interconnecting piece is configured at the more outward position in the periphery viewed from above than the shell.